﻿<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
	<title>Document</title>
	<style>
  *{margin:0;
    padding:0;
    list-style:none;}
  .wrap{height:170px;
        width:490px;
        margin:60px auto;
        overflow: hidden;
        position: relative;
        margin:100px auto;}
  .wrap ul{position:absolute;} 
  .wrap ul li{height:170px;}
  .wrap ol{position:absolute;
           right:5px;
           bottom:10px;}
  .wrap ol li{height:20px; width: 20px;
              background:#ccc;
              border:solid 1px #666;
              margin-left:5px;
              color:#000;
              float:left;
              line-height:center;
              text-align:center;
              cursor:pointer;}
  .wrap ol .on{background:#E97305;
               color:#fff;}

  </style>
  <script type="text/javascript">
  window.onload=function(){
    var wrap=document.getElementById('wrap'),
        pic=document.getElementById('pic'),
        pics=pic.getElementsByTagName('li'),
        list=document.getElementById('list').getElementsByTagName('li'),
        index=0,
        timer=null;

      // 定义并调用自动播放函数
      timer=setInterval(autoplay,2000);
      function autoplay(){
      	index++;
     	if (index>=pics.length) {
     		index=0;
     	};
     	changepic(index);
      }
      // 定义图片切换函数
     function changepic(currindex){
     	for (var j = 0; j < pics.length; j++) {
     		pics[j].style.display="none";
     		list[j].className="";
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     	list[currindex].className="on";
     	pics[currindex].style.display="";
     	index=currindex;
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     // 鼠标划过整个容器时停止自动播放
     wrap.onmouseover=function  () {
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     // 鼠标离开整个容器时继续播放至下一张
     wrap.onmouseout=function(){
     	timer=setInterval(autoplay,2000);
     }
     // 遍历所有数字导航实现划过切换至对应的图片
    for (var i = 0; i < pics.length; i++) {
     	list[i].id=i;
	    list[i].onclick=function(){
	     	changepic(this.id);
	    }
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</head>
<body>
  <div class="wrap" id='wrap'>
    <ul id="pic">
      <li><img src="http://img.mukewang.com/54111cd9000174cd04900170.jpg" alt=""></li>
      <li><img src="http://img.mukewang.com/54111dac000118af04900170.jpg" alt=""></li>
      <li><img src="http://img.mukewang.com/54111d9c0001998204900170.jpg" alt=""></li>
      <li><img src="http://img.mukewang.com/54111d8a0001f41704900170.jpg" alt=""></li>
      <li><img src="http://img.mukewang.com/54111d7d00018ba604900170.jpg" alt=""></li>    
    </ul>
    <ol id="list">
      <li class="on">1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>
    </ol>
  </div>
</body>
</html>
